Insulated dish



INSULATED DISH Original Filed Sept. 11, 1953 Clarence J'ua Mc/mReissuec] Nov. 6, 1934 UNITED STATES PATENT OFFICE No. 688,875,September 11, 1933.

Application for reissue June 7, 1934, Serial No. 729,491

3 Claims.

My invention relates to dishes and containers and has forits object toprovide a new insulated dish which will be strong in construction andeconomical to manufacture.

A further object is to provide a closed container in which either hot orcold ingredients or liquids may be placed and kept at the sametemperature at which they were inserted in the container.

A still further object is to provide a container for foods or liquidswhich may be covered if desired and which may be provided with amechanical beater therein to stir the fluids in the container ifdesired.

A still further object is to provide an insulated dish which is providedwith an insulated cover therefor and which may be used to hold certaintemperatures in the food for a long period of time so that foods such asfrozen ice cream may be placed in the dish and placed away for some timewithout the frozen cream melting.

A still further object is to provide a dish in which the insulatingmedium is that of separated dead air spaced with thin sheets of metallicmaterial therebetween with each surface of the material highly glossedor polished into a reflecting surface. Thin sheets of aluminum may beused as the metallic medium and each sheet of aluminum may be embossedor may be peened, or die cut with the inner surface or that face towardthe inner portion of the dish formed concave and the outer surfaceformed convex.

These objects I accomplish with the device illustrated in theaccompanying drawing in which similar numerals and letters of referenceindicate like parts throughout the several views and as described in thespecification forming a part of this application and pointed out in theappended claims.

In the drawing in which I have shown the best and most preferred mannerof building my invention,

Figure 1 is a diametrical section through one of the dishes with aclosed cover thereon showing the various sheets of insulated materialsectioned.

Figure 2 is a vertical section of a dish showing one method of providinga mechanical agitator or heater therefor. v

Figure 3 is a section on line 3-3 of Figure 2.

Figure 4 is a vertical section of a dish formed with fiat bottom andvertical sides.

Figure 5 is a face view of the peened surface of one of the aluminuminsulating plates.

Figure 6 is a sectional view of one of the plates when enlarged to showthe concave and convex surfaces and the direction of the rays reflectedtherefrom.

Figure 7 is a section of a dish showing other kinds of insulating, suchas cork used therein.

In the drawing I have shown the dish as a bowl A, having a cover B forthe top thereof. The bowl A is made of an inner wall 1, spaced from anouter wall 2, with legs 3 on the outer Wall to support the bowl. Theouter upper edge of the outer wall 2 is the surface to which theinsulating plates C are secured and the insulating plates 4 and 5 areset between the two walls 1 and 2 with air spaces a, b, and c separatingthe insulating plates from each other and from the inner and outer wallsof the bowl A. The plate 4 is provided with a flange 9 around the topedge thereof by which it is secured to the outer wall of the bowl bysuitable means such as solder, hydrolene, welding etc. The next plate 5is also provided with a flange 10 therearound to fit onto the flange 9and also be secured to the outer wall of the bowl, and the inner wall 1of the bowl is provided with a flange 11 to fit onto the flange 10 andbe secured to the upper edge of the outer wall of the bowl to completethe entire bowl.

This seals the inner and outer walls 1 and 2 together leaving dead airspace between the wall 1 and the plate 5, between the plates 4 and 5 andbetween the wall 2 and the plate 4, providing the dead air spaces, w, b,and c.

The cover B is made of fiat plates 12 and 13 set apart by insulatingplates 14 and 15, with dead air spaces d, e, and f therein. The plate 13on the under side of the cover is formed with an annular step 16 therearound to allow the cover to fit partly down into the bowl A and partlythereover to completely seal the cover to the bowl.

If need arises a sealing medium may be provided on the step 16, such asa cork or rubber gasket.

In Figure 2 the inner upper surface of the inside portion or plate ofthe bowl is formed into threads 18 into which the threads 19 of thecover 20 may be screwed to secure the cover to the bowl. A mechanicalmixing or stirring device D is shown inserted through the cover throughan opening 21 therein, the mixing device to be removed if desired and aplate 22 on the top of the cover moved over to close the opening. Theinner wall of the -bowl is provided with a flange on the top edgethereof to seal to the outer wall at 30 to 5 provide the sealed dead airspaces therein.

In Figure 4 the walls 25 of the bowl are perpendicular and the bottom 26is formed flat with the side walls 25 and the bottom 26 integral andWith the insulating plates 0 formed into like shape and carried betweenthe walls 24 and 25. This form of bowl being shown merely to illustratethat the scope of the invention doesnot lie only in one shape. The deadair spaces between the plates and walls of the bowl are sealed by theflat annular plate 2'? being secured thereto by suitable means.

In Figures 5 and 6, I have shown the insulating plate as made of sheetsof very thin aluminum having the surfaces either embossed or peened.

In Figure 6 the section of the insulation shows a portion of oneinsulation sheet greatly enlarged to show the form of the concave andconvex facets formed therein. These facets are made concave at 29 on theinner surface of the plates C and the outer surface is formed intoconvex facets 31 so that rays of light or heat shown as m hitting theinner surface strike the concave facets 29 and are reflected inconcentrated rays, converging at n while those rays p striking the outersurface of the sheet will engage the convex facets 31 and be dispersedas rays 1 to disperse the heat or cold. Thus if the insulation is beingused to hold the cold, the cold rays will be concentrated inwardly andthe heat rays will be dispersed outwardly.

The concave facets on the inner surface reflect either heat or coldtrying to leave the bowl and directs them back thereinto, converging theheat or' cold rays instead of dispersing them, and the convex facetsdisperse all heat or cold rays trying to pass therethrough.

Having thus described my invention I desire to secure by Letters Patentand claim:

1. In a dish of the class described, the combination of an inner wallformed of a curved sheet and an outer wall formed of a like sheet largerin diameter, with the space between the two sheets sealed; sheets ofspaced apart highly polished thin aluminum, having the inside faceformed with concave facets and the other face convex facets, carried inthe space between the inner and the outer wall; and means to hold thealuminum apart.

2. Ina dish of the class described, the combination of an inner wallformed of a curved sheet and an outer Wall formed of a like sheet largerin diameter, with the space between the two sheets sealed; sheets ofspaced apart highly reflective thin aluminum having the faces thereofpeened into irregular facets, carried in the space between the inner andouter wall; and means to hold the sheets spaced apart.

3. In a dish of the class described, the combination of an inner wallformed of a curved sheet and an outer wall formed of a like sheet oflarger diameter; with the space between the-two sheets sealed; sheets ofspaced apart highly reflective aluminum carried in the space between thewalls; the sheets having the surfaces thereof formed into irregularembossed facets; means to space the aluminum sheets apart; and a coverfor said dish formed of like construction.

CLARENCE I.

